1. MULTIPLICATION STRATEGIES
Traditional Algorithm
New Options:
Partial Products
Area Model (Array)
Lattice Method

2. Distributive Property
5 x 39 = ?
39 = x 39 = (5 x 30) + (5 x 9) = = 195

3. Review - Expanded Form 53 = 50 + 3 639 = 600 + 30 + 9
4,315 = 4,

4. Standard – 1 by 3 1 4
639
x 5
3,1 9 5

5. Expanded Algorithm- Partial Products – 1 by 3 639 x 5 45 5 x 9 150
639 =
639
x 5 45
5 x 9
150
5 x 30
+ 3000
5 x 600
3,195

6. Your Turn Solve the following using the expanded algorithm. 148 x 5

7. Area Model – 1 by 3
5 x 639 = ? 30 9 + x
600 5
3,000
150 45
150
+ 45
3,195
3,000
5 x 639 = 3,195

8. Your Turn Solve the following using the area model 35 x 4

9. Your Turn Solve the following using the area model 245 x 2

10. Lattice Method – 1 by 3
5 x 639 3 5 9 x 6 3 1 5 4 5 3 1 9 5
5 x 639 = 3,195

11. Your Turn Solve the following using the Lattice Method. 436 x 5

12. Your Turn Solve the following using the Lattice Method. 5362 x 2

13. Your Turn Solve the following using a method of your choice other than the standard algorithm. 3,572 x 5